environmental
building
clean
conservation
construction
container
dirty
drinking
energy
engineering
environment
equipment
facility
factory
filter
filtration
flow
garbage
industrial
industry
liquid
pipe
pipeline
plant
pollution
pool
pressure
production
pump
purification
purity
recycling
reservoir
sanitary
sedimentation
sewage
sludge
steel
storage
store
structure
supply
system
tank
tower
treatment
tube
turbidity
valve
water